Detail publikace

Crack resistance characterization in TiAl intermetallics with enhanced toughness

DLOUHÝ, I. STRATIL, L. FUKUTOMI, H. HASEGAWA, M.

Originální název

Crack resistance characterization in TiAl intermetallics with enhanced toughness

Anglický název

Crack resistance characterization in TiAl intermetallics with enhanced toughness

Jazyk

en

Originální abstrakt

The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable α phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of α+γ phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load - unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. © 2017 Trans Tech Publications, Switzerland.

Anglický abstrakt

The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable α phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of α+γ phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load - unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. © 2017 Trans Tech Publications, Switzerland.

Dokumenty

BibTex


@article{BUT170691,
  author="Ivo {Dlouhý} and Luděk {Stratil} and Hiroshi {Fukutomi} and Makoto {Hasegawa}",
  title="Crack resistance characterization in TiAl intermetallics with enhanced toughness",
  annote="The paper is focused on the analysis of the role of lamellar microstructure in fracture performance of model TiAl intermetallic compound. Coarse lamellar colonies and, at the same time, fine lamellar morphology were prepared by compressive deformation at 1553 K (region of stable α phase in TiAl equilibrium diagram) followed by controlled cooling to 1473 K (region of α+γ phase) with delay on this temperature and then cooling down. The fracture toughness was evaluated by means of chevron notch technique. In addition, because of enhanced toughness, crack resistance curves were obtained by load - unload technique of pre-racked beams, namely in two directions of crack propagation relative to lamellar structure. Extensive development of shear ligament toughening mechanism was observed in fracture surfaces leading to quite good fracture toughness thanks to the heat treatment applied. © 2017 Trans Tech Publications, Switzerland.",
  address="Elsevier",
  chapter="170691",
  doi="10.4028/www.scientific.net/KEM.741.13",
  howpublished="print",
  institution="Elsevier",
  number="11",
  volume="741",
  year="2016",
  month="november",
  pages="13--18",
  publisher="Elsevier",
  type="journal article in Scopus"
}